568 
PLATE LI. 
Fies. 1, 2, 3. Ornopus ELoNGATUS, A gass., : : : ; ; ; 
Mountain Limestone, Armagh, 0 Fe coll. Enniskillen Collection. 
Fic. 4. Onopus AuGcustus, Agass., 5 j : 5 ‘ 
Mountain Limestone, Armagh, . Ez coll. Geological Society, London. 
Fig. 5. Oropus catenatus, Agass., : 0 0 : : 
» 58a. The same magnified. 
Mountain Limestone, Armagh, ; Ez coll. Enniskillen Collection. 
Figs. 6, 7. Oropus cipsus, Agass., : : 5 6 0 . ° 
Mountain Limestone, Armagh, ; Ez coll. Enniskillen Collection. 
Fic. 8. Oropus scutptus, Agass., 0 . 3 : 5 : 
» 8a. The same magnified. 
Mountain Limestone, Bristol, i ; Ex coll. Bristol Museum. 
Fic. 9. Oropus ornatus, Davis, 5 A o ° 5 ‘ : 
9 a. Same, magnified. 
Mountain Limestone, Richmond, Yorkshire, /x coll. Enniskillen Collection. 
Fies. 10, 11, 12. Oropus monttiFormis, Davis, . 
er) 
Mountain Limestone, Armagh, 6 Hx coll. Enniskillen Collection. 
Fig. 13. Oropus REEDI, Davis, . 0 0 oO ; 9 : 
» Lda. Upper surface of same specimen. 
Mt. Limestone, Settle, Yorkshire, Hw. coll. Reed Collection, York Museum. 
Fie. 14. Oropus TENuIs, Davis, 
Mountain. Limestone, Armagh, : Ez coll. Enniskillen Collection. 
Fig. 15. Oropus supTEerEs, Agass., : ‘ : : 
Mountain itnmescone! Black Rock, Bristol Ez coll. Bristol Museum. 
Fie. 16. Perrovus PATELLIFoRMIS, M‘Coy, 3 : 3 
16 a. Upper surface of same; 16 0. Magnified view wo fieure 16. 
Mt, Limestone, Derbyshire, E: x. coll. Weachranadbiaa Museum, Cambridge. 
Fig. 17. RuampHopus pIspar, Davis, ; ; F : ; i : 
» 17a. Side view of longer lateral extension. 
Mountain Limestone, Armagh, 6 Hex coll, Enniskillen Collection. 
Fie. 18. LopHopus tavissiuus, Agass., 0 5 : 6 5 : 
,, 18a. Upper surface of another specimen. 
» 180.,18c¢. A series of teeth (diagrammatic). 
Mountain Limestone, Armagh. : He coll, Enniskillen Collection. 
Fig. 19. LopHopus cisperuLus, Agass., 6 : ¢ : . : 
Mountain Limestone, Armagh, : He coll. Enniskillen Collection. 
Fic. 20. LopHopus mamurnartis, Agass., : : : 6 : 0 
Mountain Limestone, Armagh, : Hex coll. Enniskillen Collection. 
Fies. 21, 21 a. Lopnopus pipymus, Agass., . 6 0 6 : c 
Mountain Limestone, Armagh, : Fx coll. Enniskillen Collection. 
Fig. 22. LopHopus rEeticuLaAtusS, Davis, : ; : . : 
Carb. Limestone, Wensley dale, Wotan, : Ex coll. Wm. Horne, Esq. 
Fies. 23, 24. LopHopus sErratus, Davis, 
Carboniferous Limestone, Wensley dale, Ew coll. Wm. Horne (Fig. 24) and 
Reed Collection, York Museum. 
Fig. 25. LopHopus BirurcAtus, Davis, 
», 29 a. Side view of the same specimen. 
Carboniferous Limestone, Wensleydale, : Ex coll. Wm. Horne, Esq. 
Fie. 26. LopHopus Levis, Davis, 
Mt. Limestone, Richmond, Vorkehive’ Ex ool, Reed Coll., , Werdk lesen, 
Fie. 27. Lopnopus Levis, Dayis, : : o 0 . 
A. series of four teeth i in natur al position. 
Mountain Limestone, Richmond, Yorkshire, Lex coll. Wm. Horne, Esq. 
Fic. 28. LopHopus stnvosus, Davis, 
Mt. Limestone, Richmond Worlelitne, Eu coll. Reed Coll., York Museum 
Fic. 29. Dictiropus scrrunus, Davis, ‘ : . 5 j 0 
,, 29 a. The same specimen magnified. 
Carb. Limestone, Wensleydale, Yorkshire, . Ex coll. Wm. Horne, Esq. 
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